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Field Engineering Education
Student Self-Study Course

IBM Confidential
Field Engineering Education
Student Self-Study Course

IBM CDnfidential

This document contains information of a proprietary nature. ALL
INFORMATION CONTAINED HEREIN SHALL BE KEPT IN CONFI-
DENCE. None of this information shall be divulged to persons
other than: IBM employees authorized by the nature of their
duties to receive such information or individuals or organizations
authorized by the Field Engineering Division in accordance
with existing policy regarding release of company information.

Common Carrier Facilities
for Teleprocessing
PREFACE

This course is provided to acquaint Customer Engi-
neers with some of the important concepts of Com-
mon Carrier equipment and facilities as used in
Teleprocessing environment. This course will also
provide the Customer Engineer with a permanent
reference for these facilities.

Address comments concerning the contents of this publication to:
IBM Corporation, Field Engineering Education, Dept. 911, Poughkeepsie, N. Y., 12602

Printed March 1966 IBM CONFIDENTIAL
CONTENTS

SECTION 1. TELEGRAPH SESSION 3, LONG DISTANCE SYSTEMS